Steam pumping-engine



(No Model.) 2 Sheets-Sheet 1.

G. F. BLAKE.

STEAM PUMPING ENGINE.

No. 270,574. Patented Jan.16,1883.

- QSheets-Sheet 2f Patented Jan. 16,1883.

r l I II (No Model.)

G. P. BLAKE. STEAM PUMPING ENGINE.

%4/ F5 Wa/M NITED STATES PATENT OFFICE.

GEORGE F. BLAKE, OF BELMONT, MASSACHUSETTS.

STEAM PUMPING-ENGINE.

SPECIFICATION forming part of Letters Patent No. 270,574, dated January16, 1883,

Application filed September 26, 1882. (N0 model.)

To all whom it may concern:

Be it known that I, GEORGE F. BLAKE, of Belmont, county of Middlesex,State of Massachusetts, have invented an Improvementin SteamPumping-Engines,of which the following description,in connection withthe accompanying drawings, is a specification.

. My invention relating to steam-pumps has "for its object to simplifythe construction of certain parts of the valve-operating mechanism.

Figure 1. is a side elevation of a pump, a

- portion of the frame-work being broken away;

Fig. 2, a transverse section of a portion thereof; Fig. 3, alongitudinal section of thevalvestem, valve rod collars, and slidingtappet; Fig. 4, a cross-section thereof on the dotted line a; w,- Figs.5 and 6, opposite end views of the adjustable valve-rod collars forthe'valvestem; Fig. 7, a plan view, and Fig. 8 a longitudinal sectionthereof.

The steam-cylinder a, piston a, with its rod 1), and the valve-actuatingengine care of any suitable constructi0nsuch, for example, as shown inLetters Patent N 0. 123,764, granted to me February 20, 1872, .to whichreference may be had.

The piston-rod b is provided with a collar, d, having alaterally-projecting stud, e, carrying a friction-roller, j, that entersa slot or fork at the end of a lever,g, having a bearing on afulcrum-pin, h, fixed upon a bracket, 2', forming a part of theframe-work.

The lever g is provided with a wrist-pin, j, connected by a link, 70,with a tappet, l, loose on the valve-stem 'm, the said tappet slidingalong the valve-stem until it strikes one of the valve-rod collars n,after which the valve-stem moves with the tappet, thus reversing theflow of steam to and from the ends of the auxiliary engine and causingit to operate the valve for the main engine.

In order to regulate the time of the movement of the valve-stem relativeto that of the piston and piston-rod of the engine, the valverod collarsn are made adjustable along the said valve-stem, which is screw-threadedfor this purpose, the said collars being internally threaded.

In order to obviate the necessity of threading the valve-stem for itsentire length, or reducing its diameter sufficiently to enable anordinary solid nut to be passed over it to the threaded portion, thesaid collars are made, as shown in Figs. 2 to 8, of a nut dividedlongitudinally into two half-nuts, 0 0, which can be placed together onthe threaded portion of the valve-stem, after which they are inclosed ina band or ring, 9, of' sufficient size to pass over the unthreadedportion of the valvestem, and are thus operatively held together, sothat they may be adjusted along the threaded portion of the valve-stemlike a solid nut. The said half-nuts are shown as shouldered at 0 upontheir outside, where they connect with the end of the ring 1), thoughthis is notnecessary, and said ring 19 is held in place upon them by aset-screw, r. The ring 1) might have wrench-faces, if desired, and itmight have internal angular faces to fit upon the outside of the halvesof a'nut of ordinary shape.

The fulcrum-pin h for the valve-actuatin g lever g is extended throughthe said lever, and provided with a guide, 8, for the valve-stein m; butin someinstances the said guide might be omitted and a suitable guide beerected at some other point on the frame-work.

. I claim 1. In a steam-pump, the combination, with the piston-rod, ofthe valve-actuating lever g, operated thereby, the fixed fulcrum-pin htherefor, the wrist-pin j, mounted upon the said he ver, and tappet I,connected therewith, substantially as and for the purpose described.

2. In a steam-pump, the valve-actuating lever and its fulcrum pin it,fixed upon the frame-work, combined with the valve-stein and guidetherefor mounted upon the said fulcrum-pin, substantially as described.

3. The combination, with a valve stem or rod threaded for a portion ofits length, of the half-nuts and their inclosing band, substantially asdescribed.

4. The half-nuts, shouldered upon their outside, as shown, combined withtheir inclosing band, whereby they are operatively held together whenmounted on a threaded rod, substantially as described.

In testimony whereofl have signed my name to this specification in thepresence of two subscribing witnesses.

GEO. F. BLAKE.

Witnesses:

G. W. GREGORY, J os. P. LIVERMORE.

